Comparison on object value with database loop

Question

I need to compare values of an object with the email I get through a select in mysql. But the comparison is not working.

Here is code for comparison and execution if there is an equal value or not.

<?

if($data){
            
            for($i = 0; $i < sizeof($data); $i++){

                      foreach($response->members as $result){
                        if($result->email_address === $data[$i]["usu_email"]){
                            $exists = "true";
                        }

                        if($exists === "true"){
                            echo "User Mysql: ".$data[$i]["usu_email"]." | update | Mailchimp: ".$result->email_address."</br>";
                            break;
                        }else{
                            echo "User Mysql: ".$data[$i]["usu_email"]." | Insert | Mailchimp: ".$result->email_address."</br>";
                        }
                    }
            }
            
        }

?>

Value in object that returns in the variable $response->members

Array ( [0] => stdClass Object ( [id] => 6a3022ed588f225aa7c48f26492932ed [email_address] => [email protected] [unique_email_id] => 1709195db4 [contact_id] => 13c74a66732323cefa6b65c0f11aaf75 [full_name] => Hebert Vianna [web_id] => 582764355 [email_type] => html [status] => subscribed [consents_to_one_to_one_messaging] => 1 [merge_fields] => stdClass Object ( [FNAME] => Hebert [LNAME] => Vianna [ADDRESS] => [PHONE] => [BIRTHDAY] => [PLANO] => mensal [INICIOPLAN] => [FIMPLANO] => ) [stats] => stdClass Object ( [avg_open_rate] => 0 [avg_click_rate] => 0 ) [ip_signup] => [timestamp_signup] => [ip_opt] => 201.92.206.63 [timestamp_opt] => 2022-02-04T20:27:13+00:00 [member_rating] => 2 [last_changed] => 2022-02-07T17:31:09+00:00 [language] => [vip] => [email_client] => [location] => stdClass Object ( [latitude] => 0 [longitude] => 0 [gmtoff] => 0 [dstoff] => 0 [country_code] => [timezone] => [region] => ) [source] => Admin Add [tags_count] => 0 [tags] => Array ( ) [list_id] => 4dd6ba9214 [_links] => Array ( [0] => stdClass Object ( [rel] => self [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed [method] => GET [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Response.json ) [1] => stdClass Object ( [rel] => parent [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members [method] => GET [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/CollectionResponse.json [schema] => https://us14.api.mailchimp.com/schema/3.0/Paths/Lists/Members/Collection.json ) [2] => stdClass Object ( [rel] => update [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed [method] => PATCH [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Response.json [schema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/PATCH.json ) [3] => stdClass Object ( [rel] => upsert [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed [method] => PUT [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Response.json [schema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/PUT.json ) [4] => stdClass Object ( [rel] => delete [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed [method] => DELETE ) [5] => stdClass Object ( [rel] => activity [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed/activity [method] => GET [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Activity/Response.json ) [6] => stdClass Object ( [rel] => goals [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed/goals [method] => GET [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Goals/Response.json ) [7] => stdClass Object ( [rel] => notes [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed/notes [method] => GET [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Notes/CollectionResponse.json ) [8] => stdClass Object ( [rel] => events [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed/events [method] => POST [targetSchema] => https://us14.api.mailchimp.com/schema/3.0/Definitions/Lists/Members/Events/POST.json ) [9] => stdClass Object ( [rel] => delete_permanent [href] => https://us14.api.mailchimp.com/3.0/lists/4dd6ba9214/members/6a3022ed588f225aa7c48f26492932ed/actions/delete-permanent [method] => POST ) ) )

This code is checking the bank and API emails in Mailchimp, but it only informs the update action and does not display other situations.